Spectroscope lens

Material: Optical Glass,Bk-7

Diameter: 5mm-200mm±0.1mm

Center Thickness Tolerance: ±0.05mm

Lens Alignment Error: ≤3min

Surface Accuracy: λ/ 8 @

Surface Quality: 60/40.40/20.80/60

Effective Caliber: 90%

Coating: 190-380 nm UV AR coating 400-1200 nm visible near-infrared AR coating (532 nm single-point AR coating, 532 + 1064 nm double-point AR coating, 808 single-point AR coating, 1064 single-point AR coating ) And the bandwidth anti-reflection film of this area.
Infrared anti-reflection film: 1560 nanometer anti-reflection film, 3-5 micron anti-reflection film, 8-12 and 7-14 micron anti-reflection film.

Medium and high reflection film: 1,355 nm / 532 nm / 635 nm / 808 nm / 1064 nm single point, double point,three point laser reflection film.

The spectroscope is a tool for examining which parts of white light are absorbed by a gemstone. Materials can absorb parts of the electromagnetic spectrum, and when the absorbed parts fall within the visible range, that absorbed part will influence the color of the material.
When a gemstone is observed with a spectroscope, the absorbed parts show as dark lines and/or bands in the spectroscope image.